STM32F446RC datasheet(96/202 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F446xC/E

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DocID027107 Rev 6

I/O system current consumption

The current consumption of the I/O system has two components: static and

dynamic.

I/O static current consumption

All the I/Os used as inputs with pull-up generate current consumption when the pin is

externally held low. The value of this current consumption can be simply computed by using

the pull-up/pull-down resistors values given in Table 56: I/O static characteristics.

For the output pins, any external pull-down or external load must also be considered to

estimate the current consumption.

Additional I/O current consumption is due to I/Os configured as inputs if an intermediate

voltage level is externally applied. This current consumption is caused by the input Schmitt

trigger circuits used to discriminate the input value. Unless this specific configuration is

required by the application, this supply current consumption can be avoided by configuring

these I/Os in analog mode. This is notably the case of ADC input pins which should be

configured as analog inputs.

Table 33. Typical current consumption in Sleep mode, regulator OFF(1)

Symbol

Parameter

Conditions

fHCLK (MHz)

VDD=3.3 V

VDD=1.7 V

Unit

IDD12

IDD

IDD12

IDD

IDD12/IDD

Supply current

in Sleep mode

from V12 and

VDD supply

All Peripherals

enabled

180

47.605

1.2

168

44.35

1.0

41.53

0.8

150

40.58

0.9

39.96

0.8

144

35.68

0.9

34.60

0.7

120

27.30

0.9

29.11

0.7

20.69

0.8

19.78

0.6

13.88

0.7

13.36

0.6

7.66

0.7

7.85

0.6

6.49

0.7

6.66

0.5

All Peripherals

disabled

180

8.71

1.2

168

7.00

0.9

8.42

0.8

150

6.88

0.9

7.61

0.8

144

6.29

0.9

6.99

0.7

120

4.87

0.9

5.95

0.7

3.78

0.8

3.96

0.6

2.66

0.7

2.80

0.6

1.65

0.7

1.74

0.6

1.45

0.7

1.52

0.5

1. When peripherals are enabled, the power consumption corresponding to the analog part of the peripherals (such as ADC,

or DAC) is not included.

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